干旱区生态环境知识资源中心(Arid): 宁夏白芨滩固定沙丘浅层土壤水分时空变异

Arid

	宁夏白芨滩固定沙丘浅层土壤水分时空变异
其他题名	Temporal and Spatial Variation of Soil Moisture in the Shallow Dune Fixed on Baijitan in Ningxia
	秦海琴 1; 展秀丽 1; 张萍 2
来源期刊	云南农业大学学报
ISSN	1004-390X
出版年	2020
卷号	35 期号:1 页码:156-163
中文摘要	【目的】揭示沙漠化治理过程中土壤含水量的动态变化规律及其在小尺度上的空间变异特征,进而为该地区防沙治沙及植被的可持续发展提供科学指导。【方法】采用烘干法和TDR300对宁夏白芨滩防沙治沙区浅层土壤含水量进行监测,应用地统计学的理论与方法研究该区域浅层土壤水分季节动态变化和小尺度空间变异特征。【结果】(1) 10 cm和30 cm的土壤含水量变异系数均在0.01~1之间,属中等变异;不同时期的10 cm及30 cm深处的土壤含水量均表现出强烈的空间自相关;4、6和9月的土壤水分(10 cm)的变异函数为球状模型,8月(10 cm)为指数模型,30 cm的土壤水分变异函数均为指数模型。(2)不同时期的表层(10 cm)土壤含水量空间分布表现为4、6和9月空间分布较相似,整体分布相对均匀;8月土壤含水量较6月增加,空间分布表现为从北向南降低,其中西北角土壤含水量最高;9月研究区内土壤表层含水量与其他时期相比最高。【结论】10 cm和30 cm土壤含水量均属中等变异,不同时期含水量均表现出强烈的空间自相关。10 cm和30 cm水分分布格局均受降水影响,9月土壤含水量最高。研究区不同时期10 cm土壤含水量空间分布特征明显不同,30 cm深处的土壤含水量随季节发生变化,两者空间分布特征均受地形、季节影响。
英文摘要	[Purpose]The study would be expected to reveal more accurately the dynamic change rule of soil water content and the characteristics of small scale spatial variation in the process of desertification combating and provide a scientific reference for the sustainable development of sand combating and vegetation in this area.[Method]In this study, the soil moisture content was monitored by oven drying method and TDR300, by applying statistics theory and methods studied on the seasonal dynamics and small scale spatial variation of soil moisture in the shallow soil.[Result](1) The variation coefficients of soil moisture content were between 0.01-1 which was moderate variation. The soil moisture content showed strong spatial autocorrelation both the depth of 10 cm and 30 cm, respectively. The variogram of soil moisture (10 cm) was spherical mode in April, June and September; and exponential model (10 cm) in August, the variogram of soil moisture was exponential model in 30 cm. (2) The spatial distribution of soil moisture content (10 cm) of April, June and September were similar, and was relatively even. The soil moisture of August was higher than June, and the spatial distribution was decreasing from north to south. The northwest corner had the highest soil moisture content. The soil moisture of September was highest in all months.[Conclusion]The soil moisture content was the moderate variation in the depth of 10 cm and 30 cm, and showed strong spatial autocorrelation. The soil moisture content (10 cm) of distribution patterns had been affected by precipitation in the depth of 10 cm and 30 cm, the September had the highest soil moisture content. In the study area, the soil moisture content in the different period of spatial distribution patterns were significantly different, the soil moisture content (30 cm) changes with the season, and the spatial distribution patterns of both were affected by the topography and season.
中文关键词	土壤含水量 ; 季节变化 ; 空间分布 ; 宁夏白芨滩
英文关键词	soil moisture content seasonal variation spatial distribution Baijitan in Ningxia
语种	中文
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:6655280
来源机构	宁夏大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/315920
作者单位	1.宁夏大学资源环境学院, 银川, 宁夏 750021, 中国; 2.宁夏大学农学院, 银川, 宁夏 750021, 中国
推荐引用方式 GB/T 7714	秦海琴,展秀丽,张萍. 宁夏白芨滩固定沙丘浅层土壤水分时空变异[J]. 宁夏大学,2020,35(1):156-163.
APA	秦海琴,展秀丽,&张萍.(2020).宁夏白芨滩固定沙丘浅层土壤水分时空变异.云南农业大学学报,35(1),156-163.
MLA	秦海琴,et al."宁夏白芨滩固定沙丘浅层土壤水分时空变异".云南农业大学学报 35.1(2020):156-163.